MCQ
Reagent $(A)$ and $(B)$ in above reaction are


- A$A = RCO_3 H , B = H_2O_2$
- B$A = RCO_3H , B = HIO_4$
- ✓$A = RCO_3 H, B = O_3$
- D$A = O_3 , B = RCO_3H$

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$(I)$ $\begin{matrix}
\begin{matrix}
\,\,\,Br \\
| \\
\end{matrix} \\
Ph-C-Ph \\
| \\
\,\,\,\,\,\,C{{H}_{3}} \\
\end{matrix}$
$(II)$ $\begin{matrix}
Br \\
|\,\,\, \\
Ph-CH-Ph \\
\end{matrix}$
$(III)$ $\begin{matrix}
Ph-CH-C{{H}_{3}} \\
|\,\,\,\,\,\,\, \\
Br\,\,\,\,\,\, \\
\end{matrix}$
$(IV)$ $PhVH_2Br$
( electron charge $= 1.60\times10^{-19}\, C$)